Authorization Bypass Through User-Controlled Key Affecting label-studio package, versions <1.23.1-r0


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.52% (42nd percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-LABELSTUDIO-20147609
  • published26 Sept 2026
  • disclosed24 Aug 2026

Introduced: 24 Aug 2026

CVE-2026-76073  (opens in a new tab)
CWE-639  (opens in a new tab)

How to fix?

Upgrade Minimos:latest label-studio to version 1.23.1-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream label-studio package and not the label-studio package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

Label Studio does not scope the annotation detail endpoint to the requesting user's organization. AnnotationAPI in label_studio/tasks/api.py declares queryset = Annotation.objects.all() and provides no get_queryset override, so the default lookup retrieves any annotation by primary key. The view's permission_required entries name annotations.view, annotations.change and annotations.delete, and label_studio/core/permissions.py registers every permission with rules.is_authenticated, so the check is satisfied by any logged-in account and no object-level organization test runs. The sibling task endpoint does constrain its queryset with project__organization set to the requester's active organization, which is the boundary this path omits. Annotation identifiers are sequential integers, so an authenticated user of one organization can enumerate identifiers to read, modify and delete annotations belonging to other organizations on the same instance. The same unscoped queryset appears on AnnotationConvertAPI in the same file.

CVSS Base Scores

version 3.1